This name is a synonym of Senna confinis (Greene) H.S.Irwin & Barneby.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13000622) with original publication details: N. Amer. Fl. 23(4): 249 1930.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:86509-2.
This name was in version 1 of The Plant List, record tro-13000622, and has not been changed.